CN104333254A - Multilevel inverter - Google Patents
Multilevel inverter Download PDFInfo
- Publication number
- CN104333254A CN104333254A CN201410350189.7A CN201410350189A CN104333254A CN 104333254 A CN104333254 A CN 104333254A CN 201410350189 A CN201410350189 A CN 201410350189A CN 104333254 A CN104333254 A CN 104333254A
- Authority
- CN
- China
- Prior art keywords
- voltage
- level inverter
- current sensor
- current
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/49—Combination of the output voltage waveforms of a plurality of converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/15—Indicating the presence of current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
Abstract
The present disclosure discloses a multilevel inverter configured to output a 3-phase voltage to a motor by allowing a plurality of unit power cells forming one phase to be serially connected, the multilevel inverter, the multilevel inverter including a plurality of current sensors configured to detect an output current of the plurality of unit power cells.
Description
Technical field
A kind of multi-level inverter of instruction relate generally to according to exemplary embodiment of the present disclosure.
Background technology
Middle pressure height holds multi-level inverter and occurs due to growth requirement convert medium voltage electricity, for promote and operate in the power industry of such as FACTS (flexible AC transmitting system) device efficiently and the electric power system of flexibility.Recently, the concern of multi-level inverter is increased, as multi-level inverter topology.
Some known structure types for multi-level inverter are cascaded H-bridges, clamp diode and flying capacitor multi-level inverter.Cascaded H-bridges inverter, by the unit block with independent DC link, is configured by the low pressure H bridge inverter be connected in series, wherein each unit voltage and equal that inverter exports and, and output voltage can change according to element number.But cascaded H-bridges inverter topology is got involved in the shortcoming that must provide independently DC link electric power.
Fig. 1 is the block diagram of the cascaded H-bridges inverter topology schematically shown according to prior art.
With reference to Fig. 1, master controller 130 and the cell controller (not shown) in multiple unit 120 is comprised according to the cascaded H-bridges inverter topology of prior art, wherein perform control by master controller 130 and cell controller, they are connected with high speed link, and data are transmitted and receive thus.
Master controller 130 receives the output current of electromotor velocity and inverter with operating motor speed and Current Control, and by synchronously three-phase voltage grade being transferred to cell controller.Cell controller use the DC link voltage of each unit 120 and from master controller 130 receive electric pressure and produce PWM (pulse-width modulation).Master controller 130 in traditional Cascade H bridge inverter detects the electric current of each phase being used for safe acceleration/deceleration motor 200 from motor 200, and is provided with current sensor 140 for this reason.
Because final insulation voltage equals the voltage of motor 200 and the detecting distance of current sensor 140 is very long, be therefore current mode current sensor instead of voltage type current sensor according to the current sensor 140 for motor 200 of prior art.In addition, current mode current sensor has strong tolerance to noise.
That is, limit due to pre-voltage and current condition and detect the selection of current sensor, and due to each phase only with an element for detecting electric current, so cannot hardware deterioration be tackled.
Summary of the invention
The disclosure provides a kind of multi-level inverter, its unit be configured to pass as being connected in series same current is provided and detect from each unit electric current and use General Current detecting element to detect the electric current of described multi-level inverter.In addition, the disclosure provides a kind of multi-level inverter, and it is configured to not consider restrictive condition about voltage and current condition and noise and applied current detecting element.
In a general scheme of the present disclosure, a kind of multi-level inverter is provided, it is configured to pass and allows multiple power unit assemblies of formation one phase be connected in series and three-phase voltage outputted to motor, described multi-level inverter comprises: multiple current sensor, and it is configured to the output current detecting multiple power unit assembly.
Preferably, but not necessarily, described multi-level inverter may further include master controller, and it is configured to pass the output current that receives multiple power unit assembly and by electric pressure information transmission to power unit assembly.
Preferably, but not necessarily, power unit assembly can comprise: rectifier, and it is configured to the AC voltage commutation of input is DC voltage; DC link electric capacity, it is configured to the output voltage of described rectifier smoothing; Cell controller, it is configured in response to the electric pressure information received from master controller and produces PWM (pulse-width modulation) signal; Inverter unit, it is configured to be converted to by the DC voltage of DC link electric capacity in response to the pwm signal of cell controller and will be output to the AC voltage of motor; And current sensor, it is configured to the output current detecting described inverter unit.
Preferably, but not necessarily, described inverter unit can comprise multiple semiconductor device, and described current sensor can detect the electric current exported from described multiple semiconductor device.
Preferably, but not necessarily, described current sensor can detect the output current of described inverter unit and this output current can be supplied to described master controller.
Beneficial effect
Being according to the beneficial effect of described multi-level inverter system of the present disclosure of description like this, even if produce hardware deficiency when system is formed, also can by exporting identical group performance and strengthen system reliability, and do not change due to independent group, the maintenance cost of system can be reduced.
Another beneficial effect is, can detect electric current to allow to detect the electric current relative to voltage safely, and can detect and be worth more accurately each group.
Accompanying drawing explanation
Fig. 1 shows the schematic block diagram of the cascaded H-bridges inverter topology according to prior art.
Fig. 2 shows the schematic block diagram of the multi-level inverter according to exemplary embodiment of the present disclosure.
Fig. 3 is the detailed block diagram of each unit that Fig. 2 is shown.
Embodiment
More completely will describe various exemplary embodiment hereinafter with reference to accompanying drawing, which show some exemplary embodiments.But principle of the present invention can be implemented in various different formats and should not be interpreted as being limited in this example embodiment illustrated.Contrary, the scheme of description is intended to comprise whole this kinds fallen within the scope of the present disclosure and novel idea and changes, amendment, and changes.
Fig. 2 shows the schematic block diagram of the multi-level inverter according to exemplary embodiment of the present disclosure.
Although describe such as cascaded H-bridges inverter according to multi-level inverter of the present disclosure, the disclosure is not limited thereto, and the disclosure can be applied to the inverter of other type.
With reference to Fig. 2, be configured to control motor 20 according to multi-level inverter 10 of the present disclosure, and it comprises master controller 11, multiple power unit assembly 12 (hereinafter mentioning as " unit ") and phase-shifting transformer 13.Phase-shifting transformer 13 is configured to independent power is supplied to each unit 12.Because phase-shifting transformer is not directly involved in the disclosure, so the detailed description of its structure will be ignored.
Multiple unit 12 comprises the unit (U1 forming U phase, U2, Un), formed V phase unit (V1, V2 ... and form the unit (W1 of W phase Vn), W2, Wn), wherein each unit is connected in series to provide a phase, and the output of these unit and can be multi-stage output voltage for drive motor 20.The element number forming a phase can be determined by output voltage.
Fig. 3 is the detailed block diagram of each unit that Fig. 2 is shown, the structure wherein due to each multiple unit is identical, so only describe a unit.
With reference to Fig. 3, comprise rectifier 31, DC link electric capacity 32 according to power unit assembly 12 of the present disclosure, inverter unit 33, current sensor 34 and cell controller 35.
The AC voltage commutation inputted from phase-shifting transformer 13 is DC voltage by rectifier 31, and DC link electric capacity 32 is smoothing to the DC voltage inputted from rectifier 31.Rectifier 31 can be formed by multiple diode.
Inverter 33 produces in response to the PWM control of cell controller 35 and will be output to the AC voltage of motor 20 and export AC voltage, and such as, it can be formed by multiple IGBT (insulated gate bipolar transistor).Current sensor 34 can detect the electric current exported from multiple semiconductor device of inverter unit 33, and electric current is supplied to master controller 11.Formed by multiple unit 12 independently although the master controller 11 of Fig. 2 is shown as, this is to simplify accompanying drawing, and the master controller 11 of multiple unit 12 can be connected to completely cut off via optical communication with cell controller 35 and reduce noise.
Master controller 11 receive output voltage from multiple unit and then by electric pressure information transmission to unit 12.Output voltage corresponding to DC link voltage can be applied to the motor 20 as load by each unit 12, and produce pwm signal in response to electric pressure information, thus, the frequency being applied to motor 20 can be changed obtain starting torque and control electromotor velocity simultaneously.
Be configured so that current sensor 34 is arranged separately according to multi-level inverter 10 of the present disclosure to be input on multiple unit 12 of the phase voltage of motor 20 in formation, and detect the output current of the inverter unit 33 in multiple unit 12.
By the structure so described, because sound level is lower than the sound level of whole multi-level inverter 10, each unit can use voltage type current sensor, and therefore, because current detecting is performed by unit 12, detecting distance is short and supply of electric power is comparatively level and smooth.Further, can overcurrent protection be carried out to each unit 12 thus reliable system can be set up.
In addition, identical from each electric current flowed out mutually, even and if an element failure, also can carry out continuous current detection, and the current information due to unit 12 is transferred to master controller 11, so control information more accurately can be transferred to cell controller 35 by master controller 11.
Further again, common voltage type current transducer can be compared use by with the current sensor of inverter unit, thus decrease cost than Conventional mass current sensor, and be restricted to cell voltage because the dielectric of current sensor is withstand voltage, therefore do not need extra insulating strength.
Although describe the disclosure in detail, the advantage in the boundary of claim, various replacement with reference to previous embodiment, amendment and change will be apparent to one skilled in the art.Therefore, it should be understood that unless otherwise specified, above-described embodiment is not limited to any details of foregoing description, but broadly should explain being defined in the scope in accessory claim.
Claims (6)
1. a multi-level inverter, it is configured to pass and allows multiple power unit assemblies of formation one phase be connected in series and three-phase voltage outputted to motor,
Described multi-level inverter comprises:
Multiple current sensor, it is configured to the output current detecting multiple power unit assembly.
2. multi-level inverter according to claim 1, comprises master controller further, and it is configured to pass the output current that receives multiple power unit assembly and by electric pressure information transmission to power unit assembly.
3. multi-level inverter according to claim 2, wherein power unit assembly comprises: rectifier, and it is configured to the AC voltage commutation of input is DC voltage; DC link electric capacity, it is configured to the output voltage of described rectifier smoothing; Cell controller, it is configured in response to the electric pressure information received from master controller and produces pwm signal; Inverter unit, it is configured to be converted to by the DC voltage of DC link electric capacity in response to the pwm signal of cell controller and will be output to the AC voltage of motor; And current sensor, it is configured to the output current detecting described inverter unit.
4. multi-level inverter according to claim 3, wherein, described inverter unit comprises multiple semiconductor device, and described current sensor detects the electric current exported from described multiple semiconductor device.
5. the multi-level inverter according to claim 3 or 4, wherein, described current sensor detects the output current of described inverter unit and this output current is supplied to described master controller.
6. the multi-level inverter according to any one in Claims 1-4, wherein, current sensor is voltage type current sensor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130085813A KR101583868B1 (en) | 2013-07-22 | 2013-07-22 | Multi-level inverter |
| KR10-2013-0085813 | 2013-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104333254A true CN104333254A (en) | 2015-02-04 |
Family
ID=51063333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410350189.7A Pending CN104333254A (en) | 2013-07-22 | 2014-07-22 | Multilevel inverter |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20150022135A1 (en) |
| EP (1) | EP2830207B1 (en) |
| JP (1) | JP6027060B2 (en) |
| KR (1) | KR101583868B1 (en) |
| CN (1) | CN104333254A (en) |
| ES (1) | ES2773039T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109314393A (en) * | 2016-06-01 | 2019-02-05 | Abb瑞士股份有限公司 | Modular multi-level converter unit with integrated current sensors |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101491933B1 (en) * | 2013-11-19 | 2015-02-09 | 엘에스산전 주식회사 | Apparatus for controlling paralleled inverter |
| KR101950302B1 (en) * | 2014-07-23 | 2019-02-20 | 엘에스산전 주식회사 | Parallel operation control method of medium voltage inverter |
| RU2629009C2 (en) * | 2016-02-16 | 2017-08-24 | Федеральное государственное унитарное предприятие "Крыловский государственный научный центр" | Alternate current variable speed drive |
| JP6817163B2 (en) * | 2017-07-12 | 2021-01-20 | 株式会社東芝 | Power converter |
| JP6390806B1 (en) * | 2017-08-02 | 2018-09-19 | 株式会社明電舎 | Inverter device |
| US10116229B1 (en) | 2017-09-19 | 2018-10-30 | King Saud University | Multilevel cascade hexagonal voltage source converter with isolated DC sources |
| CN113937986B (en) * | 2021-12-16 | 2022-03-25 | 南昌工程学院 | Method, device and equipment for detecting direct-current voltage of cascaded H-bridge power module |
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-
2013
- 2013-07-22 KR KR1020130085813A patent/KR101583868B1/en active IP Right Grant
-
2014
- 2014-06-20 US US14/311,066 patent/US20150022135A1/en not_active Abandoned
- 2014-07-07 ES ES14175917T patent/ES2773039T3/en active Active
- 2014-07-07 EP EP14175917.5A patent/EP2830207B1/en active Active
- 2014-07-22 CN CN201410350189.7A patent/CN104333254A/en active Pending
- 2014-07-22 JP JP2014149033A patent/JP6027060B2/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540556A (en) * | 2008-03-20 | 2009-09-23 | Ls产电株式会社 | Converter with a plurality of indirect voltage link a.c. converter units |
| US20100142234A1 (en) * | 2008-12-31 | 2010-06-10 | Mehdi Abolhassani | Partial regeneration in a multi-level power inverter |
| JP2010165116A (en) * | 2009-01-14 | 2010-07-29 | Daikin Ind Ltd | Current detecting circuit |
| CN102005961A (en) * | 2009-08-28 | 2011-04-06 | Ls产电株式会社 | Control device and control method of high voltage inverter |
| CN102135013A (en) * | 2011-02-14 | 2011-07-27 | 上海理工大学 | Automatic control system and automatic control method for transferring coal flows in two-stage coal bunkers of mine |
| CN102111080A (en) * | 2011-02-24 | 2011-06-29 | 广州智光电气股份有限公司 | Photovoltaic grid-connected inverter and control method |
| US20120275202A1 (en) * | 2011-04-26 | 2012-11-01 | Kabushiki Kaisha Yaskawa Denki | Series multiplex power conversion apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109314393A (en) * | 2016-06-01 | 2019-02-05 | Abb瑞士股份有限公司 | Modular multi-level converter unit with integrated current sensors |
Also Published As
| Publication number | Publication date |
|---|---|
| US20150022135A1 (en) | 2015-01-22 |
| JP6027060B2 (en) | 2016-11-16 |
| EP2830207A3 (en) | 2015-07-08 |
| KR20150011064A (en) | 2015-01-30 |
| KR101583868B1 (en) | 2016-01-08 |
| EP2830207A2 (en) | 2015-01-28 |
| JP2015023799A (en) | 2015-02-02 |
| EP2830207B1 (en) | 2019-11-27 |
| ES2773039T3 (en) | 2020-07-09 |
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| PB01 | Publication | ||
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Application publication date: 20150204 |